.page-disclaimer {
  --usage-gap: 20px;
  --usage-rule: rgba(154, 166, 162, .28);
  background: var(--ink);
  color: var(--paper);
}

.page-disclaimer a {
  color: var(--cyan);
  text-decoration-color: rgba(47, 224, 200, .45);
  text-underline-offset: 3px;
}

.page-disclaimer a:hover {
  color: var(--amber-2);
}

/* ---------- 首屏 ---------- */
.page-disclaimer .usage-hero {
  position: relative;
  padding: 56px 0 44px;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(47, 224, 200, .16), transparent 58%),
    radial-gradient(90% 70% at 4% 110%, rgba(255, 176, 32, .13), transparent 62%),
    linear-gradient(180deg, var(--ink-3), var(--ink));
  border-bottom: 1px solid var(--usage-rule);
}

.page-disclaimer .usage-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(242, 245, 243, .045) 0 1px,
    transparent 1px 64px
  );
  pointer-events: none;
}

.page-disclaimer .usage-hero__inner {
  position: relative;
  z-index: 1;
}

.page-disclaimer .usage-hero__kicker {
  margin: 22px 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-disclaimer .usage-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 7.2vw, 58px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-disclaimer .usage-hero__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 245, 243, .82);
}

.page-disclaimer .usage-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

/* ---------- 索引条 ---------- */
.page-disclaimer .usage-index {
  background: var(--ink-2);
  border-bottom: 1px solid var(--usage-rule);
  padding: 14px 0;
}

.page-disclaimer .usage-index__list {
  display: flex;
  gap: 10px 26px;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-disclaimer .usage-index__list li {
  flex: 0 0 auto;
}

.page-disclaimer .usage-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: rgba(242, 245, 243, .8);
  text-decoration: none;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.page-disclaimer .usage-index__list a:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-disclaimer .usage-index__list .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  color: var(--cyan);
}

/* ---------- 条款区 ---------- */
.page-disclaimer .usage-clause {
  padding: 46px 0 8px;
  scroll-margin-top: 96px;
}

.page-disclaimer .usage-clause--alt {
  background: linear-gradient(180deg, rgba(18, 51, 40, .55), transparent 70%);
}

.page-disclaimer .usage-clause__grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

.page-disclaimer .usage-clause__side {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--usage-rule);
}

.page-disclaimer .usage-clause__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 34px;
  line-height: 1;
  color: var(--amber);
}

.page-disclaimer .usage-clause__axis {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--grey);
}

.page-disclaimer .usage-clause__body h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 5.2vw, 32px);
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-disclaimer .usage-clause__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(242, 245, 243, .84);
}

.page-disclaimer .usage-clause__note {
  border-left: 3px solid var(--cyan-2);
  padding: 10px 0 10px 14px;
  background: rgba(18, 137, 124, .1);
  font-size: 14px;
  color: rgba(242, 245, 243, .76) !important;
}

/* ---------- 更新频率块 ---------- */
.page-disclaimer .usage-rates {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
  margin: 22px 0 20px;
}

.page-disclaimer .usage-rate {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: var(--ink-2);
  border: 1px solid var(--usage-rule);
  border-left: 4px solid var(--cyan-2);
  border-radius: var(--radius);
}

.page-disclaimer .usage-rate--cyan {
  border-left-color: var(--cyan);
}

.page-disclaimer .usage-rate--amber {
  border-left-color: var(--amber);
}

.page-disclaimer .usage-rate__label {
  font-size: 14px;
  color: var(--grey);
}

.page-disclaimer .usage-rate__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  color: var(--paper);
  white-space: nowrap;
}

.page-disclaimer .usage-rate__value em {
  font-style: normal;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 12px;
  color: var(--grey);
  margin-left: 3px;
}

/* ---------- 规则行 ---------- */
.page-disclaimer .usage-rule-row {
  display: grid;
  gap: 8px;
  padding: 14px 0;
  border-top: 1px dashed var(--usage-rule);
}

.page-disclaimer .usage-rule-row p {
  margin: 0 !important;
  font-size: 15px;
  color: rgba(242, 245, 243, .78);
}

.page-disclaimer .usage-rule-row--red {
  border-top-color: rgba(229, 72, 77, .4);
}

/* ---------- 编号示例 ---------- */
.page-disclaimer .usage-code {
  margin: 24px 0;
  padding: 20px 16px 22px;
  background: var(--cream);
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 var(--cyan-2), 12px 12px 0 rgba(232, 228, 216, .28);
}

.page-disclaimer .usage-code__visual {
  overflow: hidden;
  border: 2px solid var(--ink);
  border-radius: calc(var(--radius) - 4px);
  background: var(--ink);
}

.page-disclaimer .usage-code__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-disclaimer .usage-code__caption {
  margin: 10px 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(11, 35, 28, .62);
}

.page-disclaimer .usage-code__pieces {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-disclaimer .usage-code__piece {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  background: rgba(11, 35, 28, .05);
  border: 1px solid rgba(11, 35, 28, .22);
  border-radius: 10px;
}

.page-disclaimer .usage-code__key {
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(11, 35, 28, .58);
}

.page-disclaimer .usage-code__val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  color: var(--ink);
}

.page-disclaimer .usage-code__sample {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 2px solid var(--ink);
}

.page-disclaimer .usage-code__sample-label {
  font-size: 12px;
  letter-spacing: .14em;
  color: rgba(11, 35, 28, .6);
}

.page-disclaimer .usage-code__sample code {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(18px, 4.6vw, 26px);
  letter-spacing: .04em;
  color: var(--ink);
  background: var(--amber);
  padding: 4px 12px;
  border: 2px solid var(--ink);
  border-radius: 8px;
}

/* ---------- 折叠组 ---------- */
.page-disclaimer .usage-acc {
  margin: 22px 0 20px;
  border-top: 1px solid var(--usage-rule);
}

.page-disclaimer .usage-acc .accordion__item {
  border-bottom: 1px solid var(--usage-rule);
}

.page-disclaimer .usage-acc .accordion__trigger {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 16px 0;
  background: none;
  border: 0;
  text-align: left;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
  cursor: pointer;
}

.page-disclaimer .usage-acc .accordion__trigger .num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--amber);
}

.page-disclaimer .usage-acc .accordion__trigger:hover {
  color: var(--amber-2);
}

.page-disclaimer .usage-acc .accordion__panel {
  padding: 0 0 16px;
}

.page-disclaimer .usage-acc .accordion__panel[hidden] {
  display: none;
}

.page-disclaimer .usage-acc .accordion__inner p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 245, 243, .78);
}

.page-disclaimer .usage-acc .accordion__inner p:last-child {
  margin-bottom: 0;
}

/* ---------- 适用范围 ---------- */
.page-disclaimer .usage-scope {
  display: grid;
  gap: 12px;
  margin: 20px 0;
}

.page-disclaimer .usage-scope__item {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 12px;
  padding: 16px;
  background: var(--ink-2);
  border: 1px solid var(--usage-rule);
  border-radius: var(--radius);
}

.page-disclaimer .usage-scope__icon {
  font-size: 11px;
  line-height: 1.9;
  color: var(--cyan-2);
}

.page-disclaimer .usage-scope__icon--cyan {
  color: var(--cyan);
}

.page-disclaimer .usage-scope__icon--amber {
  color: var(--amber);
}

.page-disclaimer .usage-scope__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-disclaimer .usage-scope__item p {
  margin: 0 !important;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(242, 245, 243, .76);
}

/* ---------- 联系值班台 ---------- */
.page-disclaimer .usage-contact {
  margin-top: 54px;
  padding: 40px 0 48px;
  background:
    linear-gradient(120deg, rgba(255, 176, 32, .12), transparent 55%),
    var(--ink-3);
  border-top: 2px solid var(--usage-rule);
}

.page-disclaimer .usage-contact__head h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 5.4vw, 30px);
  color: var(--paper);
}

.page-disclaimer .usage-contact__head p {
  margin: 0 0 22px;
  font-size: 15px;
  color: var(--grey);
}

.page-disclaimer .usage-contact__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
}

.page-disclaimer .usage-contact__list > div {
  padding: 14px 16px;
  background: rgba(242, 245, 243, .04);
  border: 1px solid var(--usage-rule);
  border-left: 4px solid var(--amber);
  border-radius: var(--radius);
}

.page-disclaimer .usage-contact__list dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--grey);
  margin-bottom: 6px;
}

.page-disclaimer .usage-contact__list dd {
  margin: 0;
  font-size: 16px;
  color: var(--paper);
  word-break: break-word;
}

.page-disclaimer .usage-contact__list dd.num {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: .04em;
}

.page-disclaimer .usage-contact__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--grey);
}

/* ---------- 平板 ---------- */
@media (min-width: 620px) {
  .page-disclaimer .usage-rates {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-disclaimer .usage-code__pieces {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-disclaimer .usage-rule-row {
    grid-template-columns: 132px 1fr;
    align-items: start;
    gap: 16px;
  }

  .page-disclaimer .usage-contact__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-disclaimer .usage-scope {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-disclaimer .usage-hero {
    padding: 78px 0 58px;
  }

  .page-disclaimer .usage-clause {
    padding: 62px 0 12px;
  }

  .page-disclaimer .usage-clause__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 40px;
  }

  .page-disclaimer .usage-clause__side {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    border-bottom: 0;
    border-left: 2px solid var(--usage-rule);
    padding: 0 0 0 16px;
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .page-disclaimer .usage-clause__num {
    font-size: 48px;
  }

  .page-disclaimer .usage-clause__body {
    max-width: 76ch;
  }

  .page-disclaimer .usage-code {
    padding: 26px 26px 28px;
  }

  .page-disclaimer .usage-contact__inner {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 40px;
    align-items: start;
  }

  .page-disclaimer .usage-contact {
    margin-top: 72px;
    padding: 56px 0 64px;
  }

  .page-disclaimer .usage-contact__note {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer * {
    animation: none !important;
    transition: none !important;
  }
}